From the introduction: Luigi, Mario's more cowardly and humble younger brother, finally thought he'd caught a break when he saw the letter in his mail saying he'd won a mansion in a contest! The only problem being that he didn't enter the contest in the first place. Finding it shady, but not wanting to pass up the opportunity, Luigi and Mario agreed to meet up outside the mansion and investigate together. By the time Luigi had made it to the mansion Mario was nowhere to be found. Despite his fear, the cowardly younger brother figures Mario must be inside and so he enters on his own. You've wound up in the mansion too, one way or another, and with a bit of currency to help you along your way. Can you survive one night in the mansion?